The assigning of the numbers means Smith has built cases and has possible charges to file soon against the men, according to court officials.

Renna, a City Council aide and former city marshal, appeared before the grand jury without counsel on Dec. 6. Renna is a fixture in city Democratic campaign circles and is one of several political operatives and officials to appear before two grand juries in the two-year-long probe of forged absentee ballots in the 2009 Working Families Party primary.

John Brown spent most of the day Oct. 27 in front of the special grand jury. Brown, a Democrat, was accompanied to the session by his lawyer, Phil Steck.

Steck has said Brown did not forge any signatures but the lawyer would not comment on whether Brown was granted immunity. Steck however did say that Brown's brother Dan Brown, who Steck also represents, did receive immunity when he testified last week.

Dan Brown, a Democratic political operative, his brother and City Council President Clement Campana are the targets of the current grand jury investigating the case, according to a person who testified before the current grand jury. Campana has said he refused to testify before the grand jury.

DeFiglio, who in a statement to investigators said that absentee ballot rigging in the city was a "normal political tactic," testified before the first grand jury on Dec. 8, 2010. A former Troy Housing Authority clerk, DeFiglio did not have an attorney with him and has refused comment on the case.

Last year, the first grand jury indicted Councilman Michael LoPorto and Democratic County Elections Commissioner Edward McDonough on numerous forgery charges. They face trial next month.

Amid new allegations of fraud, a second grand jury was empaneled earlier this year and resumed the investigation.

In August, former Troy City Clerk William A. McInerney pleaded guilty to a charge that he signed a voter's signature to a Working Families Party absentee primary ballot in 2009 to steer the vote to his Democratic Party candidates. His sentence is pending.

Councilmen Kevin McGrath and Gary Galuski have also testified before the grand juries, as have several voters and board of elections workers.